Co Starring Frank Welker voices Scooby Doo Frank Welker voices Fred Jones Kate Micucci voices Velma Dinkley Dee Bradley Baker voices Phantasm Fred Tatasciore as Colonel Sanders Fred Tatasciore as Phantasm Matthew Lillard voices Shaggy Rogers Grey DeLisle Griffin voices Daphne Blake Eric Bauza as Cousin Slicker Peter New as Jay Stephen Stanton voices Cosgood Creeps Kegan Firth as Ghost Kid Michael Girardin as Alan